rs149866955

Variant names:

• chr1-45332278-C-G
• rs149866955
• NM_001048174.2:c.737G>C

Your query was ambiguous. Multiple possible variants found:

• chr1-45332278-C-G
• chr1-45332278-C-T

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Moderate

The NM_001048174.2(MUTYH):​c.737G>C​(p.Arg246Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R246Q) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MUTYH NM_001048174.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.88
• Publications: 33 publications found

Genes affected

MUTYH (HGNC:7527): (mutY DNA glycosylase) This gene encodes a DNA glycosylase involved in oxidative DNA damage repair. The enzyme excises adenine bases from the DNA backbone at sites where adenine is inappropriately paired with guanine, cytosine, or 8-oxo-7,8-dihydroguanine, a major oxidatively damaged DNA lesion. The protein is localized to the nucleus and mitochondria. This gene product is thought to play a role in signaling apoptosis by the introduction of single-strand breaks following oxidative damage. Mutations in this gene result in heritable predisposition to colorectal cancer, termed MUTYH-associated polyposis (MAP). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2017]

MUTYH Gene-Disease associations (from GenCC):

• familial adenomatous polyposis 2

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, G2P
• colorectal cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• familial ovarian cancer

  Inheritance: AD, AR Classification: NO_KNOWN Submitted by: ClinGen
• hereditary breast carcinoma

  Inheritance: AD, AR Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000288208 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 11 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 38 uncertain in NM_001048174.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-45332278-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 41764.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.847
• PP5: Variant 1-45332278-C-G is Pathogenic according to our data. Variant chr1-45332278-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 827517.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUTYH	NM_001048174.2	c.737G>C	p.Arg246Pro	missense_variant	Exon 10 of 16	ENST00000456914.7	NP_001041639.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MUTYH	ENST00000456914.7	c.737G>C	p.Arg246Pro	missense_variant	Exon 10 of 16	1	NM_001048174.2	ENSP00000407590.2
ENSG00000288208	ENST00000671898.1	n.1325G>C		non_coding_transcript_exon_variant	Exon 14 of 21			ENSP00000499896.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Aug 19, 2019

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R274P variant (also known as c.821G>C), located in coding exon 10 of the MUTYH gene, results from a G to C substitution at nucleotide position 821. The arginine at codon 274 is replaced by proline, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. A likely pathogenic variant, p.R274W, has been described in the same codon. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.82
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	.;.;.;.;.;T;.;.;.;T;.;T
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	.;D;.;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.99	D
MutationAssessor	Pathogenic	3.5	.;.;.;.;.;M;.;.;.;.;.;.
PhyloP100		3.9
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-5.7	D;D;D;D;D;D;D;D;D;.;D;D
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0020	D;D;D;D;D;D;D;D;D;.;D;D
Sift4G	Uncertain	0.0060	D;D;D;D;D;D;D;D;D;D;T;D
Polyphen		1.0, 1.0	.;.;.;.;.;D;D;.;D;.;.;.
Vest4		0.69
MutPred		0.60		.;.;.;.;.;.;.;.;Gain of catalytic residue at R274 (P = 0.0191);.;.;.;
MVP		0.99
MPC		0.66
ClinPred		0.99	D
GERP RS		5.6
PromoterAI		-0.0016	Neutral
Varity_R		0.96
gMVP		0.88
Mutation Taster		=13/87	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs149866955; hg19: chr1-45797950;